Thanks m0hamed and Phil the Flyer for reassuring me! I once had a sortlike experience in Paraguay, where I actually had to slip over a couple of dollars to people at both security and customs in order to make it to my flight! Great to hear that there is no need for that in CAI.

I will take the longer journey to the airport in account when ordering a taxi, thanks for pointing that out!

I'll probably write a trip report after my trip, so I'll post back my experiences of both the airport and the in-flight service!